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ZJUS-A
Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering)  2007, Vol. 8 Issue (3 ): 5-    DOI: 10.1631/jzus.2007.A0370
    
Study on the instantaneous protection reliability of low voltage circuit breakers
LU Jian-guo, DU Tai-hang, LUO Yan-yan
Electrical Apparatus Institute, Hebei University of Technology, Tianjin 300130, China
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Abstract  This paper outlines the significance of enhancing the instantaneous protection reliability of low voltage circuit breakers and describes their main failure modes. The instantaneous failure mechanism of low voltage circuit breakers was analyzed so that measures to improve instantaneous protection reliability can be determined. Furthermore, the theory of the instantaneous characteristics calibration device for low voltage circuit breakers and the method of eliminating the non-periodic component of test current are given in detail. Finally, the test results are presented.

Key words： Low voltage circuit breakers      Instantaneous protection reliability      Non-periodic component of current      Phase selective closing     
Received: 19 December 2006     
CLC:  TB114.3  
  O224  
  O211.6  
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LU Jian-guo
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LU Jian-guo, DU Tai-hang, LUO Yan-yan. Study on the instantaneous protection reliability of low voltage circuit breakers. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2007, 8(3 ): 5-.

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http://www.zjujournals.com/xueshu/zjus-a/10.1631/jzus.2007.A0370     OR     http://www.zjujournals.com/xueshu/zjus-a/Y2007/V8/I3 /5

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